Loudspeaker membrane and method for manufacturing such a membrane
AssigneeFocal Jmlab
InventorsBruno De La Nouvelle, Shintaro Hosoi
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Abstract
The invention relates to a loudspeaker membrane having a sandwich structure, having a central web separating two layers of material based on high-rigidity threads impregnated with a polymer resin, characterized in that the central web is formed from a layer of material based on oriented natural fibres that are impregnated with a polymer resin.
Claims11
Loudspeaker membrane with a sandwich structure, which comprises a central core separating two layers of materials made of high-rigidity yarn, impregnated with a polymerised resin, wherein the central core is formed of a material made of oriented natural fibres that are nearly parallel to each other and are impregnated with a polymer resin.
Manufacturing process of a loudspeaker membrane comprising the following stages:
- formation of a stack comprising:
- a first layer of material made of high-rigidity yarn;
- a core layer comprising a material made of oriented natural fibres;
- a second layer of material made of high-rigidity yarn;
- the shaping of the said stack by applying pressure and exposing it to a source of heat in order to polymerise a resin that is present in the said stack;
- the cutting of the shaped stack to match it to the desired contours of the membrane.
Dependencies are inferred from the claim text.